Willis's Antbird

Willis's antbird is 13.5 to 14.5 cm (5.3 to 5.7 in) long and weighs 15 to 17 g (0.53 to 0.60 oz). Males of the nominate subspecies are almost entirely gray, with somewhat lighter underparts than upperparts. They have a white patch between their scapulars and narrow white tips on their wing coverts and outer tail feathers. Females have olive-gray upperparts and ear coverts, browner wings and tail, and cinnamon edges on their wing coverts. They have a very small white interscapular patch. Their throat and underparts are tawny-buff with an olive tinge to their flanks. Males of subspecies C. l. Voice: The song of the male Willis's antbird is a "very high, short, very sharp 'puh-wéedi-wéedi-wéedih'"; the "wéedi" is repeated two to five times. Females answer with "a short series of usually 4 notes, notes initially longer than those of male but becoming shorter and rising in pitch"; they may begin singing during the male's song.